Grand mal

A generalized tonic-clonic seizure is a seizure involving the entire body. It is also called a grand mal seizure. Such seizures usually involve muscle rigidity, violent muscle contractions, and loss of consciousness.

Generalized tonic-clonic seizures are the type of seizure that most people associate with the term "seizure," convulsion, or epilepsy. They may occur in people of any age, as a single episode, or as part of a repeated, chronic condition (epilepsy).

Symptoms
Many patients have an aura (a sensory warning sign) before the seizure. This can include vision, taste, smell, or sensory changes, hallucinations, or dizziness.

The seizure itself involves:

Loss of consciousness or fainting, usually lasting between 30 seconds and 5 minutes